/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.engine.modification;

import org.apache.iotdb.commons.path.PartialPath;

import java.util.Objects;

/**
 * Modification represents an UPDATE or DELETE operation on a certain timeseries.
 */
public abstract class Modification {

    protected Type type;
    protected PartialPath path;
    protected long fileOffset;

    Modification(Type type, PartialPath path, long fileOffset) {
        this.type = type;
        this.path = path;
        this.fileOffset = fileOffset;
    }

    public String getPathString() {
        return path.getFullPath();
    }

    public PartialPath getPath() {
        return path;
    }

    public String getDevice() {
        return path.getDevice();
    }

    public String getMeasurement() {
        return path.getMeasurement();
    }

    public void setPath(PartialPath path) {
        this.path = path;
    }

    public long getFileOffset() {
        return fileOffset;
    }

    public void setFileOffset(long fileOffset) {
        this.fileOffset = fileOffset;
    }

    public Type getType() {
        return type;
    }

    public void setType(Type type) {
        this.type = type;
    }

    public enum Type {
        DELETION
    }

    @Override
    public boolean equals(Object obj) {
        if (this == obj) {
            return true;
        }
        if (!(obj instanceof Modification)) {
            return false;
        }
        Modification mod = (Modification) obj;
        return mod.type.equals(this.type)
                && mod.path.equals(this.path)
                && mod.fileOffset == this.fileOffset;
    }

    @Override
    public int hashCode() {
        return Objects.hash(type, path, fileOffset);
    }
}
